People Who Get Johnson & Johnson Vaccine at Elevated Risk of Guillain-Barré Syndrome: Study

People who receive the Johnson & Johnson COVID-19 vaccine are at elevated risk of getting a severe autoimmune disorder that can cause paralysis, according to a new study.

Researchers used data from the Vaccine Safety Datalink, which is run by the Centers for Disease Control and Prevention (CDC). They found (pdf) 21 potential cases, 11 of which were confirmed, of Guillain-Barré syndrome (GBS) in people who got the shot. Most happened with 13 days of vaccination.

The incidence rate of confirmed cases per 100,000 person-years was 34.6 during the 1 to 21 days after administration, much higher than the historical…